| 单词 | wall-coal |
| 释义 | > as lemmaswall-coal wall-coal n. (see quot.). ΘΚΠ the world > the earth > minerals > mineral deposits > [noun] > stratum or bed > of coal > part of coal seam symon fault1834 swilly1836 split1877 underply1883 wall-coal1886 1886 J. Barrowman Gloss. Sc. Mining Terms 70 Wall~coal, breast coal; the middle division of three in a seam, the other two being termed top coal and ground coal. < as lemmas |
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